Drawer storage lets you easily see your inventory right in front of you, so inventorying items becomes a much easier and more accurate task. On your shelf, items are going to get moved around, shifting away from assigned homes. Items are also much more likely to get lost on shelves, which leads to wasted inventory and/or stock-outs. Within a highly-organized modular drawer, each individual item has its own compartment and items are much less likely to get lost or misidentified. Also, as items can be viewed from the front of the drawer to the farthest back corners, visual accounting is easy. And order picking takes much less time, as well.
